CVE-2018-3817: Elastic Logstash

Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days.

When logging warnings regarding deprecated settings, Logstash before 5.6.6 and 6.x before 6.1.2 could inadvertently log sensitive information.

Affected products

• Elastic Logstash: before 5.6.6 (fixed in 5.6.6); from 6.0.0, before 6.1.2 (fixed in 6.1.2)

Published 2018-03-30. Last modified 2026-06-17.